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Abstract
Fluoride is determined in Saudi Arabian water samples. Fluoride is precipitated as lead chlorofluoride and the excess lead is determined potentiometrically using molybdate in the presence of a lead-ion selective electrode. Fluoride ions can be determined in the concentration range of 1.9 g to 190 μg per liter. The results are compared with those of the colorimetric procedure using eriochrome cyanine R in the presence of Ce(III).